You know what they say: you never get a second chance to make a first impression. These days it's most likely that impression will be online. In this piece, we consider the top five mistakes businesses make online that leave a bad taste in customers' mouths.

comScore: DNC Drove Visitors to Democratic and Republican Sites

comScore Networks has released an analysis of Web visitation related to the Democratic National Convention. Among other findings, the analysis revealed that visitation to JohnKerry.com spiked dramatically during the candidate's speech late Thursday. comScore also monitored an increase in traffic to GeorgeWBush.com during Senator Kerry's speech.

comScore findings included: JohnKerry.com drew an average of 28,000 visitors per hour between 10:00 AM and midnight EDT on Thursday, July 29. In total, more than 300,000 Americans visited JohnKerry.com that day, a substantially higher level than is recorded on an average day (in June, JohnKerry.com drew an average of approximately 40,000 visitors per day). On Thursday, July 29, visitation to JohnKerry.com peaked between 10:00 PM EDT and 11:00 PM EDT, the period during which Senator Kerry delivered his speech (which encouraged Americans to visit the site). During that hour, the site drew approximately 50,000 visitors.

During Senator Kerry's speech, GeorgeWBush.com drew approximately 30,000 visitors, which was the highest hourly traffic level recorded in at least the past week. During the convention week, well over 100,000 Americans visited JohnKerry.com each day from work, according to comScore, and traffic was most concentrated during lunch hours (between approximately 11:00 AM EDT and 3:00 PM EDT). At peak usage periods, more than 45,000 at-work visitors per hour logged on to JohnKerry.com.(www.comscore.com; www.georgewbush.com; www.johnkerry.com)